US3473296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption process for gas separation
Assignee: Individual
•
Filing: 1966-11-29
•
Granted: 1969-10-21
•
Expires: 1986-11-29
Abstract
No abstract record available.
Inventors
- 👤 Takaaki Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:22
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D2253/00; B01D2253/10; B01D2253/104; B01D2253/106; B01D2256/00; B01D2256/10; B01D2256/12; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40011; B01D2259/40058; B01D2259/40066; B01D2259/402; B01D2259/403; B01D53/0407; B01D53/0423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2882244A
Cited
US2963519A
Cited
US2962355A
Cited
US3061992A
Cited
US3221476A
Cited
US3313091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |